Igbt testing device and testing apparatus

Abstract

The application provides an IGBT testing device and testing equipment, comprising: a control device and a testing device connected in communication; the control device comprises a first Bluetooth module; the testing device comprises a second Bluetooth module and a safety detection module; the testing device is connected with an external IGBT; the control device is used for sending testing data to the second Bluetooth module through the first Bluetooth module; the testing device is used for performing double-pulse testing on the external IGBT according to the testing data, obtaining testing parameters of the external IGBT, and sending the testing parameters to the control device through the second Bluetooth module; and the testing device is also used for stopping testing when the safety detection module generates an alarm signal and sending the alarm signal to the control device through the second Bluetooth module. The safety of IGBT double-pulse testing is improved by remotely performing IGBT testing and setting a safety detection module on the IGBT testing device, so as to guarantee the personal safety of the tester.

Description

Technical Field

[0001] This invention relates to the field of IGBT testing, and in particular to an IGBT testing apparatus and testing equipment. Background Technology

[0002] Benefiting from the global trend of energy conservation and environmental protection, and the domestic background of carbon neutrality, the fields of new energy vehicles and new energy power generation are developing rapidly, leading to a gradual expansion of the demand for IGBTs (Insulated Gate Bipolar Transistors). However, the losses generated by IGBTs during energy transmission, especially switching losses, greatly affect their performance and lifespan. The parameters in IGBT module specifications are test data under specific conditions and may not necessarily represent their actual performance in real-world applications. Therefore, it is necessary to test the performance of IGBTs to consider actual application conditions.

[0003] The existing IGBT double-pulse test process involves charging the capacitor via a charging isolating switch using a DC high-voltage power supply. When the capacitor voltage reaches the test voltage, the charging isolating switch is closed, causing the IGBT to display the measured waveform on an oscilloscope. The capacitor is then discharged via a discharging isolating switch. During the experiment, the tester needs to manually control the opening and closing of the isolating switch to charge and discharge the capacitor. If the isolating switch or the DC high-voltage power supply malfunctions, the power supply cannot charge or discharge the capacitor in a timely manner, potentially endangering the personal safety of the tester, resulting in poor test safety. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an IGBT testing device and testing equipment, thereby improving the safety of IGBT double-pulse testing and thus ensuring the personal safety of testing personnel.

[0005] In a first aspect, embodiments of the present invention provide an IGBT testing apparatus, comprising: a control device and a testing device connected in communication; the control device includes a first Bluetooth module; the testing device includes a second Bluetooth module and a safety detection module; wherein the testing device is connected to an external IGBT; the control device is used to send test data to the second Bluetooth module via the first Bluetooth module; the testing device is used to perform a double-pulse test on the external IGBT based on the test data, obtain test parameters of the external IGBT, and send the test parameters to the control device via the second Bluetooth module; the testing device is also used to stop the test when the safety detection module generates an alarm signal, and send the alarm signal to the control device via the second Bluetooth module.

[0006] Furthermore, the control device also includes a first control chip and an input module and a start module respectively connected to the first control chip; a first Bluetooth module is connected to the first control chip; the first control chip is used to acquire the start detection signal sent by the start module, acquire the test data input by the user through the input module according to the start detection signal, and send the start detection signal and the test data to the second Bluetooth module through the first Bluetooth module; wherein, the test data includes the double pulse width and the bus voltage.

[0007] Furthermore, the test equipment also includes a connected second control chip and a detection module; the detection module includes a capacitor; the second control chip is connected to the second Bluetooth module, the security detection module, and the external IGBT respectively; the detection module is connected to the external IGBT; the second control chip is used to send the start detection signal received by the second Bluetooth module to the detection module so that the detection module charges the capacitor; the second control chip is also used to generate a double pulse waveform signal according to the double pulse width, and when the capacitor voltage is equal to the bus voltage, send the double pulse waveform signal to the external IGBT to perform a double pulse test on the external IGBT.

[0008] Furthermore, the detection module also includes a capacitor voltage detection circuit; the capacitor voltage detection circuit includes a third resistor and a fourth resistor; wherein, the second end of the third resistor, the first end of the fourth resistor, and the second control chip are all connected to the capacitor voltage endpoint; the second end of the fourth resistor is connected to the first end of the capacitor; the second control chip is also used to acquire the voltage value of the capacitor voltage endpoint and determine the capacitor voltage based on the voltage value of the capacitor voltage endpoint; when the capacitor voltage is 0V, the test parameters of the external IGBT are acquired and the test parameters are sent to the first control chip.

[0009] Furthermore, the detection module also includes a DC high-voltage power supply, a charging circuit, and a discharging circuit connected in sequence; the charging circuit includes a connected charging relay and a charging isolating switch; the discharging circuit includes a sequentially connected discharging isolating switch and a discharging relay; the positive terminal of the DC high-voltage power supply is connected to the first terminal of the charging circuit, and the negative terminal of the DC high-voltage power supply is connected to the second terminal of the discharging circuit; the first terminal of the capacitor is connected to the second terminal of both the charging circuit and the discharging circuit, and the second terminal of the capacitor is connected to the second terminal of the discharging circuit; a second control chip is connected to the DC high-voltage power supply, the charging relay, and the discharging relay respectively; the second control chip is also used to send a start detection signal to the DC high-voltage power supply and the charging circuit respectively, so that the DC high-voltage power supply supplies power to the detection module according to the start detection signal; when the capacitor voltage is equal to the bus voltage, a charging circuit disconnect signal is sent to the charging circuit, and a discharging circuit open signal is sent to the discharging circuit; the charging circuit is used to close the charging relay and the charging isolating switch to charge the capacitor when it receives the start detection signal; and to open the charging relay and the charging isolating switch when it receives the charging circuit disconnect signal; the discharging circuit is used to close the discharging relay and the discharging isolating switch to discharge when it receives the discharging circuit open signal.

[0010] Furthermore, the safety detection module includes a discharge circuit voltage measurement circuit and a charging circuit voltage measurement circuit; the discharge circuit voltage measurement circuit includes a connected sixth resistor and a seventh resistor; the charging circuit voltage measurement circuit includes a connected first resistor and a second resistor; the second terminal of the seventh resistor, the first terminal of the sixth resistor, and the second control chip are all connected to the discharge circuit voltage terminal; the second terminal of the sixth resistor is connected to the discharge circuit; the second terminal of the second resistor, the first terminal of the first resistor, and the second control chip are all connected to the charging circuit voltage terminal; the second terminal of the first resistor is connected to the charging circuit; the first terminals of the seventh resistor, the second resistor, and the third resistor are all grounded; the second control chip... The first control chip is also used to acquire the voltage value of the discharge circuit voltage endpoint when the charging relay and the charging disconnect switch are closed, and to determine the discharge circuit voltage based on the voltage value of the discharge circuit voltage endpoint; when the discharge circuit voltage is not 0V, an alarm signal is generated; the second control chip is also used to acquire the voltage value of the charging circuit voltage endpoint when the discharge relay and the discharge disconnect switch are closed, and to determine the charging circuit voltage based on the voltage value of the charging circuit voltage endpoint; when the charging circuit voltage is not 0V, an alarm signal is generated; the second control chip is also used to send the alarm signal to the first control chip and the detection module respectively, so that the DC high voltage power supply is turned off, the charging circuit is disconnected, and the discharge circuit is closed.

[0011] Furthermore, the safety detection module also includes an infrared detection circuit; the infrared detection circuit includes an infrared sensor; wherein, the infrared detection circuit is connected to the second control chip; the infrared detection circuit is used to generate an alarm signal to the second control chip when the infrared sensor is triggered after receiving the start detection signal sent by the second control chip.

[0012] Furthermore, the control device also includes an indicator light and a buzzer; the indicator light is connected to the first control chip; the buzzer is connected to the first control chip; the first control chip is also used to control the indicator light to stay on when a test parameter is received; and to control the indicator light to flash and the buzzer to sound when an alarm signal is received.

[0013] Furthermore, the control device also includes an emergency stop module; the emergency stop module is connected to the first control chip; the first control chip is also used to acquire the emergency stop signal sent by the emergency stop module and send the emergency stop signal to the test equipment so that the test equipment stops performing double-pulse testing on the external IGBT.

[0014] Secondly, embodiments of the present invention provide a testing device, including a host computer and an IGBT testing device as described above; the host computer is communicatively connected to the IGBT testing device; the host computer is used to acquire and save the test parameters of the IGBT testing device, and determine the performance of the IGBT based on the test parameters.

[0015] This invention provides an IGBT testing apparatus and testing equipment, including: a control device and a testing device connected by communication; the control device includes a first Bluetooth module; the testing device includes a second Bluetooth module and a safety detection module; wherein the testing device is connected to an external IGBT; the control device is used to send test data to the second Bluetooth module via the first Bluetooth module; the testing device is used to perform a double-pulse test on the external IGBT based on the test data, obtain the test parameters of the external IGBT, and send the test parameters to the control device via the second Bluetooth module; the testing device is also used to stop the test when the safety detection module generates an alarm signal, and send the alarm signal to the control device via the second Bluetooth module. This method improves the safety of IGBT double-pulse testing by remotely performing IGBT testing and setting a safety detection module in the IGBT testing apparatus, thereby ensuring the personal safety of testing personnel.

[0016] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the IGBT testing device provided in Embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the control device provided in Embodiment 1 of the present invention;

[0021] Figure 3 This is a schematic diagram of the experimental equipment provided in Embodiment 1 of the present invention;

[0022] Figure 4 This is a schematic diagram of the testing equipment provided in Embodiment 2 of the present invention.

[0023] Icons: 1-Control device; 2-Testing device; 3-External IGBT; 4-Host computer; 5-IGBT testing device; 101-First Bluetooth module; 102-First control chip; 103-Input module; 104-Start module; 105-Indicator light; 106-Buzzer; 107-Emergency stop module; 201-Second Bluetooth module; 202-Safety detection module; 203-Second control chip; 204-Detection module; 205-Capacitor voltage detection circuit; 206-Charging circuit; 207-Discharging circuit; 208-Discharging circuit voltage measurement circuit; 209-Charging circuit voltage measurement circuit; 210-Infrared detection circuit. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] To facilitate understanding of this embodiment, the embodiments of the present invention will be described in detail below.

[0026] Example 1:

[0027] Figure 1 This is a schematic diagram of the IGBT testing device provided in Embodiment 1 of the present invention.

[0028] Reference Figure 1 The IGBT testing device includes: a control device 1 with communication connection and a testing device 2.

[0029] Figure 2 This is a schematic diagram of the control device provided in Embodiment 1 of the present invention.

[0030] Figure 3 This is a schematic diagram of the experimental equipment provided in Embodiment 1 of the present invention.

[0031] Reference Figure 1 and Figure 2 The control device 1 includes a first Bluetooth module 101; the test device 2 includes a second Bluetooth module 201 and a safety detection module 202; wherein the test device 2 is connected to an external IGBT 3.

[0032] Control device 1 is used to send test data to second Bluetooth module 201 via first Bluetooth module 101.

[0033] Here, both the first Bluetooth module 101 and the second Bluetooth module 201 are KC-05 ​​Bluetooth modules, set to full-duplex mode, capable of both receiving and transmitting data. They operate on a 2.4GHz wireless frequency band and are data transmission modules based on Bluetooth Specification V2.0 with EDR (Enhanced Data Rate). The maximum transmit power of both modules is 4dBm, with a receive sensitivity of -85dBm. They feature onboard PCB antennas, enabling communication up to 10 meters. Both modules include built-in LEDs (Light-Emitting Diode Lights) for visually indicating the Bluetooth connection status. AT commands are supported, allowing users to change roles, serial port baud rate, device name, and other parameters as needed.

[0034] In one embodiment, reference is made to Figure 2 The control device 1 also includes a first control chip 102 and an input module 103 and a start module 104 respectively connected to the first control chip 102; the first Bluetooth module 101 is connected to the first control chip 102.

[0035] The first control chip 102 is used to acquire the start detection signal sent by the start module 104, acquire the test data input by the user through the input module 103 according to the start detection signal, and send the start detection signal and the test data to the second Bluetooth module 201 through the first Bluetooth module 101.

[0036] Here, the first control chip 102 can be an FPGA (Field Programmable Gate Array). FPGAs offer powerful performance, leveraging the advantages of hardware parallelism to break the sequential execution pattern, completing more processing tasks per clock cycle and surpassing the computing power of digital signal processors (DSPs). Software tools provide the programming environment, and the FPGA circuit is the true "hard" execution process of the program. Processor-based systems often contain multiple abstraction layers, allowing for task planning and resource sharing among multiple processes. The driver layer controls hardware resources, while the operating system manages memory and processor bandwidth. For any given processor core, only one instruction can be executed at a time, and processor-based systems constantly face the risk of time-limited task contention. FPGAs, however, do not use an operating system, possessing true parallel execution and deterministic hardware focused on each task, reducing the possibility of stability issues. Compared to other chips, FPGA chips offer more powerful and stable computing capabilities, maximizing the safety, stability, and efficiency of IGBT dynamic performance testing.

[0037] The startup module 104 can be a start button, which initiates testing when the user presses the start button. The input module 103 can be a touch-screen serial port, allowing the user to input test data into the control device 1 via the touch screen.

[0038] Touchscreen serial ports are commonly used in industrial control and equipment manufacturing to replace traditional buttons, knobs, and digital displays, allowing for display and control on a single screen. Touchscreen serial port commands are simple; serial commands enable communication between the touchscreen and the controller, thereby commanding other devices to operate. Touchscreen serial port displays are versatile; as long as the controller supports serial communication, this type of touchscreen can be used. Most industrial controllers can be controlled, such as microcontrollers and PLCs (Programmable Logic Controllers). User interface design is simple. Designing such an interface using the manufacturer's provided development software is generally not difficult.

[0039] The test data includes the double-pulse pulse width and the bus voltage. The double-pulse experiment requires understanding the relationship between the preset current I, preset voltage U, and preset load reactance L (i.e.,...). Calculate the first pulse width value t1, the second pulse width value t2, and the third pulse width value t3 corresponding to the preset current, and determine the first pulse width value t1, the second pulse width value t2, and the third pulse width value t3 as the double pulse width, and determine the preset voltage U as the bus voltage.

[0040] Specifically, after confirming that the wiring of the user-controlled device 1 and the test device 2 is correct, the user inputs the pre-set test data into the touch-screen serial port and presses the start button, causing the input module 103 to send the input test data to the first control chip 102. The first control chip 102 packages the test data into a string array and sends it to the second Bluetooth module 201 of the test device 2 via the first Bluetooth module 101, so that the test device 2 can start performing a double-pulse test on the external IGBT3.

[0041] Test equipment 2 is used to perform a double-pulse test on the external IGBT3 based on the test data, obtain the test parameters of the external IGBT3, and send the test parameters to control equipment 1 through the second Bluetooth module 201.

[0042] Here, the test parameters are the test waveforms of the external IGBT3.

[0043] In one embodiment, reference is made to Figure 2 and Figure 3 The test equipment 2 also includes a second control chip 203 and a detection module 204 connected to it; the detection module 204 includes a capacitor C1.

[0044] The second control chip 203 is connected to the second Bluetooth module 201, the security detection module 202 and the external IGBT 3 respectively; the detection module 204 is connected to the external IGBT 3.

[0045] Here, the second control chip 203 can also be an FPGA.

[0046] The second control chip 203 is used to send the start detection signal received by the second Bluetooth module 201 to the detection module 204 so that the detection module 204 charges the capacitor C1.

[0047] In one embodiment, reference is made to Figure 2 The detection module 204 also includes a DC high-voltage power supply DC, a charging circuit 206 and a discharging circuit 207 connected in sequence; the charging circuit 206 includes a connected charging relay KA1 and a charging isolation switch S1; the discharging circuit 207 includes a connected discharging isolation switch S2 and a discharging relay KA2.

[0048] Here, the relay serves as the control port for the charging and discharging of the disconnecting switch, and features high voltage resistance, fast response, high sensitivity, low control power, and good electromagnetic compatibility.

[0049] The discharge circuit also includes a fifth resistor R5, one end of which is connected to the discharge relay KA2, and the other end is connected to the charging isolation switch S1.

[0050] The positive terminal of the DC high-voltage power supply DC is connected to the first terminal of the charging circuit 206, and the negative terminal of the DC high-voltage power supply DC is connected to the second terminal of the discharging circuit 207; the first terminal of the capacitor C1 is connected to the second terminal of the charging circuit 206 and the second terminal of the discharging circuit 207, and the second terminal of the capacitor C1 is connected to the second terminal of the discharging circuit 207; the second control chip 203 is connected to the DC high-voltage power supply DC, the charging relay KA1, and the discharging relay KA2, respectively.

[0051] The second control chip 203 is also used to send the start detection signal to the DC high voltage power supply DC and the charging circuit 206 respectively, so that the DC high voltage power supply DC supplies power to the detection module 204 according to the start detection signal; when the capacitor voltage is equal to the bus voltage, it sends the charging circuit 206 disconnect signal to the charging circuit 206 and sends the discharging circuit 207 open signal to the discharging circuit 207.

[0052] The charging circuit 206 is used to close the charging relay KA1 and the charging isolation switch S1 to charge the capacitor C1 when a start detection signal is received; and to open the charging relay KA1 and the charging isolation switch S1 when a charge circuit 206 disconnect signal is received.

[0053] The discharge circuit 207 is used to close the discharge relay KA2 and the discharge isolating switch S2 to discharge when a discharge circuit 207 open signal is received.

[0054] Specifically, the second control chip 203 sends a start detection signal to the DC high-voltage power supply DC and the charging circuit 206. The charging circuit 206 closes the charging relay KA1 and the charging isolation switch S1 based on the received start detection signal. The DC high-voltage power supply DC outputs its bus voltage to charge capacitor C1 through the charging circuit 206 until the capacitor voltage reaches the bus voltage. The second control chip 203 acquires the capacitor voltage in real time. When the capacitor voltage reaches the bus voltage, it sends a charging circuit 206 disconnect signal to the charging circuit 206, causing the charging relay KA1 to de-energize and the charging isolation switch S1 to open, thereby performing a double-pulse test on the external IGBT3.

[0055] Simultaneously, a discharge circuit 207 open signal is sent to discharge circuit 207. Discharge circuit 207 closes discharge relay KA2 and discharge isolation switch S2 according to the discharge circuit 207 open signal to discharge capacitor C1. When the capacitor voltage is equal to 0V, a double pulse test is completed.

[0056] In one embodiment, the second control chip 203 is further configured to generate a double-pulse waveform signal based on the double-pulse pulse width, and send the double-pulse waveform signal to the external IGBT3 when the capacitor voltage of capacitor C1 is equal to the bus voltage, so as to perform a double-pulse test on the external IGBT3.

[0057] Here, the external IGBT3 includes an IGBT chip and a trigger board, a driver board, and an oscilloscope, all connected to the IGBT chip. The trigger board and driver board are connected via optical fiber. A second control chip 203 is electrically connected to the trigger board. The second control chip 203 controls the trigger board based on test data. The trigger board generates a dual-pulse optical fiber signal based on the test data to trigger the driver board, causing the driver board to drive the IGBT chip to output the corresponding waveform to the oscilloscope and the second control chip 203.

[0058] In one embodiment, reference is made to Figure 2 The detection module 204 also includes a capacitor voltage detection circuit 205; the capacitor voltage detection circuit 205 includes a third resistor R3R3 and a fourth resistor R4; wherein, the second end of the third resistor R3R3, the first end of the fourth resistor R4, and the second control chip 203 are connected to the capacitor voltage terminal; the second end of the fourth resistor R4 is connected to the first end of the capacitor C1.

[0059] Here, the voltage at the capacitor's voltage terminal is the capacitor voltage.

[0060] The second control chip 203 is also used to acquire the voltage value of the capacitor voltage terminal and determine the capacitor voltage based on the voltage value of the capacitor voltage terminal; when the capacitor voltage is 0V, it acquires the test parameters of the external IGBT3 and sends the test parameters to the first control chip 102.

[0061] Here, when the capacitor voltage rises from 0V to the bus voltage and then drops back to 0V, it indicates that the double-pulse test is completed in one test. At this time, the test parameters of the external IGBT3 are acquired and sent to the control device 1.

[0062] The test equipment 2 is also used to stop the test when the safety detection module 202 generates an alarm signal, and to send the alarm signal to the control equipment 1 through the second Bluetooth module 201.

[0063] In one embodiment, reference is made to Figure 2 The safety detection module 202 includes a discharge circuit voltage measurement circuit 208 and a charging circuit voltage measurement circuit 209; the discharge circuit voltage measurement circuit 208 includes a sixth resistor R6 and a seventh resistor R7 connected together; the charging circuit voltage measurement circuit 209 includes a first resistor R1 and a second resistor R2 connected together.

[0064] Here, the charging circuit voltage measurement circuit 209 and the discharging circuit voltage measurement circuit 208 determine whether a system fault has occurred by monitoring the voltage at a certain point. The voltage measurement circuit, composed of two resistors, utilizes the principle of voltage division through multiple resistors connected in series to proportionally reduce the voltage. In other words, the voltage measurement circuit is a circuit that attenuates the input signal (the voltage on the isolating switch line). The output voltage can be changed by altering the value of each resistor. The second main control chip collects this output voltage to determine whether the device is damaged.

[0065] Specifically, if the discharge circuit voltage measuring circuit 208 detects a voltage during charging, it indicates that the discharge isolation switch S2 is damaged. If the charging circuit voltage measuring circuit 209 detects a voltage during discharging, it indicates that the charging isolation switch S1 is damaged.

[0066] The second end of the seventh resistor R7, the first end of the sixth resistor R6, and the second control chip 203 are all connected to the voltage terminal of the discharge circuit 207; the second end of the sixth resistor R6 is connected to the discharge circuit 207.

[0067] The second end of the second resistor R2, the first end of the first resistor R1, and the second control chip 203 are all connected to the voltage terminal of the charging circuit 206; the second end of the first resistor R1 is connected to the charging circuit 206.

[0068] The first terminal of the seventh resistor R7, the first terminal of the second resistor R2, and the first terminal of the third resistor R3 are all grounded.

[0069] The second control chip 203 is also used to obtain the voltage value of the voltage terminal of the discharge circuit 207 when the charging relay KA1 and the charging isolation switch S1 are closed, and to determine the voltage of the discharge circuit 207 based on the voltage value of the voltage terminal of the discharge circuit 207; and to generate an alarm signal when the voltage of the discharge circuit 207 is not 0V.

[0070] Here, when the DC high-voltage power supply DC charges capacitor C1 through charging circuit 206, the discharge circuit voltage measuring circuit 208 collects the voltage of discharge circuit 207 at this time. If the voltage of discharge circuit 207 is not 0V at this time, it indicates that the discharge isolating switch S2 is damaged. At this time, the second control chip 203 generates an alarm signal.

[0071] The second control chip 203 is also used to obtain the voltage value of the voltage terminal of the charging circuit 206 when the discharge relay KA2 and the discharge isolating switch S2 are closed, and to determine the voltage of the charging circuit 206 based on the voltage value of the voltage terminal of the charging circuit 206; and to generate an alarm signal when the voltage of the charging circuit 206 is not 0V.

[0072] Here, when capacitor C1 is discharging through discharge circuit 207, charging circuit voltage measuring circuit 209 collects the voltage of charging circuit 206 at this time. If the voltage of charging circuit 206 is not 0V at this time, it indicates that the charging isolation switch S1 is damaged. At this time, the second control chip 203 generates an alarm signal.

[0073] The second control chip 203 is also used to send alarm signals to the first control chip 102 and the detection module 204 respectively, so that the DC high voltage power supply DC is turned off, the charging circuit 206 is disconnected, and the discharging circuit 207 is closed.

[0074] Here, after receiving the alarm signal, the detection module 204 shuts off the DC high-voltage power supply, disconnects the charging relay KA1, and opens the discharging relay KA2. Simultaneously, it sends the alarm signal to the second Bluetooth module 201 via the first Bluetooth module 101.

[0075] In one embodiment, reference is made to Figure 2 The safety detection module also includes an infrared detection circuit 210; the infrared detection circuit 210 includes an infrared sensor; wherein the infrared detection circuit 210 is connected to the second control chip 203.

[0076] The infrared detection circuit 210 is used to generate an alarm signal to the second control chip 203 when the infrared sensor is triggered after receiving the start detection signal sent by the second control chip 203.

[0077] Here, the human body has a constant body temperature, generally around 37 degrees Celsius, so it emits infrared rays with a specific wavelength of about 10 μm. The infrared detection circuit 210 works by detecting the infrared rays of about 10 μm emitted by the human body. The infrared detection circuit 210 uses the infrared technology of an infrared sensor to sense whether there is a human body in the nearby space, and has the characteristics of high sensitivity, high reliability, and ultra-low power consumption.

[0078] Specifically, during the test, if someone accidentally enters the test area, the infrared sensor will detect the intrusion and, simultaneously, the test equipment 2 will automatically shut off the DC high-voltage power supply, disconnect the charging relay KA1, and open the discharging relay KA2. This ensures that the equipment can quickly lose power in the event of an accident, guaranteeing the personal safety of the test personnel during the test.

[0079] In one embodiment, reference is made to Figure 3 The control device 1 also includes an indicator light 105 and a buzzer 106; the indicator light 105 is connected to the first control chip 102; the buzzer 106 is connected to the first control chip 102.

[0080] The first control chip 102 is also used to control the indicator light 105 to stay on when test parameters are received; and to control the indicator light 105 to flash and the buzzer 106 to sound when an alarm signal is received.

[0081] Here, when the device is performing a normal double-pulse test, indicator light 105 remains constantly lit. When there is a problem with the test equipment 2 or someone accidentally enters the test area during the test, indicator light 105 flashes and buzzer 106 sounds.

[0082] In one embodiment, reference is made to Figure 3 The control device 1 also includes an emergency stop module 107; the emergency stop module 107 is connected to the first control chip 102.

[0083] The first control chip 102 is also used to acquire the emergency stop signal sent by the emergency stop module 107 and send the emergency stop signal to the test equipment 2 so that the test equipment 2 stops performing double pulse test on the external IGBT3.

[0084] Here, the emergency stop module 107 can be an emergency stop button. When the user wants to terminate the test, they can stop the test by touching the emergency stop button. At the same time, the test equipment 2 automatically controls the shutdown of the DC high-voltage power supply, disconnects the charging relay KA1, and opens the discharging relay KA2.

[0085] This invention provides an IGBT testing device, comprising: a control device and a testing device connected via communication; the control device includes a first Bluetooth module; the testing device includes a second Bluetooth module and a safety detection module; wherein the testing device is connected to an external IGBT; the control device is used to send test data to the second Bluetooth module via the first Bluetooth module; the testing device is used to perform a double-pulse test on the external IGBT based on the test data, obtain test parameters of the external IGBT, and send the test parameters to the control device via the second Bluetooth module; the testing device is also used to stop the test when the safety detection module generates an alarm signal, and send the alarm signal to the control device via the second Bluetooth module. This method, by remotely performing IGBT testing and setting a safety detection module in the IGBT testing device, improves the safety of IGBT double-pulse testing, thereby ensuring the personal safety of testing personnel.

[0086] Example 2:

[0087] Figure 4 This is a schematic diagram of the testing equipment provided in Embodiment 2 of the present invention.

[0088] Reference Figure 4 The testing equipment includes a host computer 4 and the aforementioned IGBT testing device 5.

[0089] The host computer 4 is connected to the IGBT testing device 5 for communication.

[0090] The host computer 4 is used to acquire and save the test parameters of the IGBT test device 5, and determine the performance of the IGBT based on the test parameters.

[0091] This invention provides a testing device, comprising: a control device and a testing device connected via communication; the control device includes a first Bluetooth module; the testing device includes a second Bluetooth module and a safety detection module; wherein the testing device is connected to an external IGBT; the control device is used to send test data to the second Bluetooth module via the first Bluetooth module; the testing device is used to perform a double-pulse test on the external IGBT based on the test data, obtain test parameters of the external IGBT, and send the test parameters to the control device via the second Bluetooth module; the testing device is also used to stop the test when the safety detection module generates an alarm signal, and send the alarm signal to the control device via the second Bluetooth module. This method, by remotely performing IGBT testing and setting a safety detection module in the IGBT testing device, improves the safety of IGBT double-pulse testing, thereby ensuring the personal safety of testing personnel.

[0092] The computer program product provided in this embodiment of the invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods described in the preceding method embodiments. For specific implementation details, please refer to the method embodiments, which will not be repeated here.

[0093] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0094] Furthermore, in the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0095] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0096] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0097] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An IGBT testing device, characterized in that, include: A control device and a testing device with communication connection; the control device includes a first Bluetooth module; the testing device includes a second Bluetooth module and a security detection module; wherein the testing device is connected to an external IGBT; The control device is used to send test data to the second Bluetooth module via the first Bluetooth module; The test equipment is used to perform a double-pulse test on the external IGBT based on the test data, obtain the test parameters of the external IGBT, and send the test parameters to the control device through the second Bluetooth module; The test equipment is also used to stop the test when the safety detection module generates an alarm signal, and to send the alarm signal to the control equipment through the second Bluetooth module; The testing equipment further includes a detection module; the detection module includes a charging circuit and a discharging circuit; the charging circuit includes a charging isolation switch; the discharging circuit includes a discharging isolation switch; the safety detection module includes a discharge circuit voltage measurement circuit and a charging circuit voltage measurement circuit. If the voltage detection circuit of the discharge circuit detects a voltage during charging, it is determined that the discharge isolating switch is damaged; if the voltage detection circuit of the charging circuit detects a voltage during discharging, it is determined that the charging isolating switch is damaged.

2. The IGBT testing apparatus according to claim 1, characterized in that, The control device further includes a first control chip and an input module and a start module respectively connected to the first control chip; the first Bluetooth module is connected to the first control chip; The first control chip is used to acquire the start detection signal sent by the start module, acquire the test data input by the user through the input module according to the start detection signal, and send the start detection signal and the test data to the second Bluetooth module through the first Bluetooth module; wherein, the test data includes double pulse width and bus voltage.

3. The IGBT testing apparatus according to claim 2, characterized in that, The testing equipment also includes a connected second control chip and the detection module; the detection module includes a capacitor. The second control chip is connected to the second Bluetooth module, the security detection module, and the external IGBT, respectively; the detection module is connected to the external IGBT. The second control chip is used to send the start detection signal received by the second Bluetooth module to the detection module, so that the detection module charges the capacitor; The second control chip is also used to generate a double-pulse waveform signal based on the double-pulse pulse width, and when the capacitor voltage of the capacitor is equal to the bus voltage, send the double-pulse waveform signal to the external IGBT to perform a double-pulse test on the external IGBT.

4. The IGBT testing apparatus according to claim 3, characterized in that, The detection module further includes a capacitor voltage detection circuit; the capacitor voltage detection circuit includes a third resistor and a fourth resistor; wherein, the second end of the third resistor, the first end of the fourth resistor, and the second control chip are all connected to the capacitor voltage terminal; the second end of the fourth resistor is connected to the first end of the capacitor; The second control chip is further configured to acquire the voltage value of the capacitor voltage terminal, determine the capacitor voltage based on the voltage value of the capacitor voltage terminal, and acquire the test parameters of the external IGBT when the capacitor voltage is 0V, and send the test parameters to the first control chip.

5. The IGBT testing apparatus according to claim 4, characterized in that, The detection module further includes a DC high-voltage power supply, the charging circuit, and the discharging circuit connected in sequence; the charging circuit includes a connected charging relay and a charging isolation switch; the discharging circuit includes a sequentially connected discharging isolation switch and a discharging relay. The positive terminal of the DC high-voltage power supply is connected to the first terminal of the charging circuit, and the negative terminal of the DC high-voltage power supply is connected to the second terminal of the discharging circuit; the first terminal of the capacitor is connected to the second terminal of the charging circuit and the second terminal of the discharging circuit, and the second terminal of the capacitor is connected to the second terminal of the discharging circuit; the second control chip is connected to the DC high-voltage power supply, the charging relay, and the discharging relay respectively. The second control chip is also used to send the start detection signal to the DC high voltage power supply and the charging circuit respectively, so that the DC high voltage power supply supplies power to the detection module according to the start detection signal; when the capacitor voltage is equal to the bus voltage, a charging circuit disconnection signal is sent to the charging circuit, and a discharge circuit open signal is sent to the discharge circuit. The charging circuit is configured to close the charging relay and the charging isolation switch to charge the capacitor when the start detection signal is received; and to open the charging relay and the charging isolation switch when the charging circuit disconnection signal is received. The discharge circuit is used to close the discharge relay and the discharge isolating switch to discharge when a discharge circuit open signal is received.

6. The IGBT testing apparatus according to claim 5, characterized in that, The discharge circuit voltage measurement circuit includes a sixth resistor and a seventh resistor connected together; the charging circuit voltage measurement circuit includes a first resistor and a second resistor connected together. The second end of the seventh resistor, the first end of the sixth resistor, and the second control chip are all connected to the discharge circuit voltage terminal; the second end of the sixth resistor is connected to the discharge circuit. The second end of the second resistor, the first end of the first resistor, and the second control chip are all connected to the voltage terminal of the charging circuit; the second end of the first resistor is connected to the charging circuit. The first terminal of the seventh resistor, the first terminal of the second resistor, and the first terminal of the third resistor are all grounded; The second control chip is also used to acquire the voltage value of the discharge circuit voltage terminal when the charging relay and the charging isolation switch are closed, and determine the discharge circuit voltage based on the voltage value of the discharge circuit voltage terminal; and generate an alarm signal when the discharge circuit voltage is not 0V. The second control chip is also used to acquire the voltage value of the charging circuit voltage terminal when the discharge relay and the discharge isolating switch are closed, and to determine the charging circuit voltage based on the voltage value of the charging circuit voltage terminal; and to generate the alarm signal when the charging circuit voltage is not 0V. The second control chip is also used to send the alarm signal to the first control chip and the detection module respectively, so as to shut down the DC high voltage power supply, disconnect the charging circuit, and close the discharging circuit.

7. The IGBT testing apparatus according to claim 6, characterized in that, The security detection module further includes an infrared detection circuit; the infrared detection circuit includes an infrared sensor; wherein the infrared detection circuit is connected to the second control chip; The infrared detection circuit is used to generate an alarm signal to the second control chip when the infrared sensor is triggered after receiving the start detection signal sent by the second control chip.

8. The IGBT testing apparatus according to claim 7, characterized in that, The control device further includes an indicator light and a buzzer; the indicator light is connected to the first control chip; the buzzer is connected to the first control chip; The first control chip is also used to control the indicator light to stay on when the test parameters are received; and to control the indicator light to flash and the buzzer to sound when the alarm signal is received.

9. The IGBT testing apparatus according to claim 2, characterized in that, The control device further includes an emergency stop module; the emergency stop module is connected to the first control chip. The first control chip is also used to acquire the emergency stop signal sent by the emergency stop module and send the emergency stop signal to the test equipment so that the test equipment stops performing a double-pulse test on the external IGBT.

10. A testing device, characterized in that, The device includes a host computer and the IGBT testing device according to any one of claims 1-9; the host computer is communicatively connected to the IGBT testing device; the host computer is used to acquire and save the test parameters of the IGBT testing device, and determine the performance of the IGBT based on the test parameters.

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